Job tibbs



' 4 Sheets-Sheet 1.

I J. TIBBS Mill Furnace for theManufaoture of Iron, W V} No. 237,785. V Patented Feb. 15,1881.

ETERS, FHOTO-LITHOGRAPHER. WASHINGTON D c 4 Sheets-Sheet 2. J T I B B S.

Mill Furnace forthe Ma-nufacture of Iron.

No. 237,785; Patented Feb. 15,1881.

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NJE'TERS, PHDTO-UTHOGRAFHEF, \fVASjlNGTON. D. C.

4 Sheets-Sheet 8.

J. TIBBS.

Mill Furnacefor the Manufacture of Iron. No.' --2 37,78"5. Patented Feb. 15,1881.

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No. 237,785. Patented Feb. 15,1881.

N PETERS. PHDTO-LITHOGRAPMER, WASHINGYQN, D. C.

rrnn STATES PATENT Fries,

JOB TIBBS, OF TIPTON, COUNTY OF STAFFORD, ENGLAND, ASSIGNOR TO EDWARD G. SOOVIL, OF ST. JOHN, NEW BRUNSWICK, CANADA,

MILL-FURNACE FOR THE MANUFACTURE OF IRON.

SPECIFICATION forming part of Letters Patent No. 237,785, dated February 15, 1881.

I Application filed February 12, 1880. Patented in England June 28, 1876.

To all whom it may concern Be it known that I, J OB TIBBS, of Tipton, county of Stafford, England, have invented Improvements in Mill-Furnaces for the Mannfacture' of Iron, of which the following is a specification.

The following description, taken in connection with the accompanying plate of drawings, hereinafter referred to, forms a full and exact specification, wherein are set forth the nature and principles of the invention, by which the same may be distinguished from others of a similar class, together with such parts thereof as are claimed as new and are desired to be secured by Letters Patent of the United States.

My invention, for which I have obtained a patent in Great Britain, No. 2,664, hearing date June 28, 1876, consists of the improvements, hereinafter described, in puddling-furnaces used in the manufacture of iron, the object of my said improvements being to prevent the accumulation of cinder or slag on the bed of the furnace, and the production thereby of a dry bed and the ready collection of the cinder or slag.

In constructing a puddling-furnace according to my invention, I make the bottom of the furnace inclined from front to back, and also from the fire-bridge to the flue-bridge, and at the back and near the flue end of the furnace is a hole or channel for the cinder or slag to run out. The said hole or channel passes through the back wall of the furnace and opens into a small supplementary chamber made outside the said furnace. The said supplementary chamber is for the reception of a wagon, in which the fuel-cinder is received. The supplementary chamber is provided with a door for introducing and removing the wagon. When closed the chamber is air-tight, or nearly air-tight, whereby access of air to the mill-furnace and the cooling of the cinder or slag in the wagon is prevented.

A hinged door or sliding door may be used for opening and closing the supplementary chamber containing the wagon.

The inclined bottom of the furnace may be r =ade of plates of iron, which are covered with fettling of oxide of iron, from three and a half to seven inches thick.

When the puddling-furnace is in use the cinder or slag formed passes to the outlet hole or passage in the back wall of the furnace, and from thence trickles into the wagon in the supplementary chamber. By this arrangement the cinder never accumulates on the bed of the furnace, but runs into the wagon as fast as it is formed. A dry bed is thereby obtained. As the supplementary chamber is maintained at a high temperature the slag or cinder accumulating in the wagon cools very slowly. Thesolidilied cinder thus obtained is very dense and forms excellent fettling for puddling-furnaces. This fettling is superior to that obtained by tapping the furnace from time to time, as is usually practiced.

I do not limit myself to the position described of the supplementary chamber containing the cinder-receiving wagon.

I will now describe, with reference to the accompanying drawings, the manner in which my invention is to be performed.

Figure 1 represents, in side elevation, Fig. 2 in end elevation, Fig. 3 in horizontal section, Fig. 4 in transverse vertical section, and Fig. 5 in longitudinal vertical section, a small furnace containing my improvements. The transverse section, Fig. 4, is taken on the line C D of Figs. 1 and 3, and the longitudinal section, Fig. 5, is taken on the line A B of Fig. 2.

The same letters of reference indicate the same parts in the several figures of the drawings.

a is the furnace, the bottom b of which is inclined from front to back--that is, the said bottom incline-s toward the part c at the flue end 01 of the furnace, the bottom of the furnace inclining both in the direction of its length and breadth, the lowest part of the furnacebottom being situated at the end 0 of the furis a tap-hole or channehf, (see Figs. 1 and 4,) for the cinder or slag to run from the furnace. The said tap hole or channel f passes through the back wall, 0, of the furnace and opens into the small supplementary chamber 9, made outside the furnace. In this supplementary chamber g a wagon, h, (or other convenient receptacle,) is placed, working upon a tramway, for receiving the fused cinder from the furnace. The said wagon h, when in its place in the chamber g, is situated under the tap-hole or channelf. The said supplementary chamber 1 is closed at top, and is open at the front for the purpose of introducing and removing the cinder-wagon h. The said open front of the chamber 9 is closed during the working of the furnace by the sliding door t", counterbalanced in the manner respresented in the drawings. In the drawings the door 2' is represented in its raised position. When the counterbalanced sliding door is depressed or lowered the chamber g is closed air tight, or nearly air-tight, and access of air to the cinder or slag in the wagon h and to the mill-furnace is prevented.

Instead of the sliding door 2', a hinged door or doors may be used for opening and closing the front of the chamber 7.

In the door i is a sight-hole, 7:, closed by the hinged plate I, for ascertaining the state of the cinder in the wagon and the proper working of the tap-hole f. An opening, an, is also made in the top of the chamber 1 for permitting the workman, without raising the door 1 to clear the tap-holef, or to introduce into it a small block of coal or other block, when it is required, to prevent the consolidation of the said slag in the said hole. The opening on is closed by the dovetail slide 12.

"When the mill-furnace is in use the cinder or slag formed in the furnace is conducted by the inclined bottom to the tap-hole or ouletpassagefin the back wall of the furnace,.and from thence trickles into the wagon IL in the chamber as will be understood by an examination of Fig. 4. The slag or cinder is thereby prevented from accumulating on the bed of the furnace, the said slag or cinder being conducted into the wagon h as fast as it is formed, and a dry bed to the furnace is obtained. The supplementary chamber 1 being maintained at a high temperature, the slag or cinder deposited iu the wagon it cools "cry slowly, and hence the solidified cinder has the qualities hereinbefore pointed out.

The parts of the mill-furnace which I have not described are of the ordinary construction and constitute no part of my invention.

I claim- In a mill-furnace for the manufacture ofiron, the combination, with the furnace at, having the inclined bottom I), and inclined dischargespout f, of the supplementary chamber g, adapted to receive and having a tramway for a truck or car, It, and provided with end door 1', having sight-opening 7c, and the top door, 1) m, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 2d day of September, 1870.

JOB TIBBS. [L. s]

\Vitnesses:

WILLIAM HENRY TtNsLEY, (JIIARLEs ALLENDER. 

